Abstract

The Radiation Budget Instrument (RBI) is a satellite payload being built by Harris Corporation, Fort Wayne, IN for NASA Langley for inclusion on the Joint Polar Satellite Systems 2 (JPSS-2) mission. Space Dynamics Laboratory (SDL) has contracted with Harris to provide calibration services for RBI.

RBI will measure earth-reflected solar and earth-emitted radiation using three broadband radiometric sensors, covering a spectral range from 200 nm to greater than 100 µm. A key RBI spectral calibration requirement is to provide a relative spectral responsivity (RSR) for each sensor, over the full spectral range, with an RSR band-integrated uncertainty budget of 0.25% for both a solar irradiance spectrum and a 300K blackbody spectrum.

This paper shows how SDL will accomplish these demanding RBI RSR measurements. Included is an overview of measurement planning, testing configurations and detailed modeling of the expected results.

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The Radiation Budget Instrument (RBI) is a satellite payload being built by Harris Corporation, Fort Wayne, IN for NASA Langley for inclusion on the Joint Polar Satellite Systems 2 (JPSS-2) mission. Space Dynamics Laboratory (SDL) has contracted with Harris to provide calibration services for RBI.

RBI will measure earth-reflected solar and earth-emitted radiation using three broadband radiometric sensors, covering a spectral range from 200 nm to greater than 100 µm. A key RBI spectral calibration requirement is to provide a relative spectral responsivity (RSR) for each sensor, over the full spectral range, with an RSR band-integrated uncertainty budget of 0.25% for both a solar irradiance spectrum and a 300K blackbody spectrum.

This paper shows how SDL will accomplish these demanding RBI RSR measurements. Included is an overview of measurement planning, testing configurations and detailed modeling of the expected results.